Coherent ground-state transport of neutral atoms

TL;DR

This paper proposes a theoretical model for long-range, coherent ground-state transport of neutral atoms, enabling simulation of various quantum phenomena while minimizing atomic spontaneous emission effects.

Contribution

It introduces a novel scheme combining Rydberg pumping and van der Waals interactions for robust quantum state transport in neutral atoms.

Findings

Model enables simulation of Heisenberg XX spin chain and SSH model.

Achieves high-fidelity quantum state transfer.

Robust against atomic position fluctuations.

Abstract

Quantum state transport is an important way to study the energy or information flow. By combining the unconventional Rydberg pumping mechanism and the diagonal form of van der Waals interactions, we construct a theoretical model via second-order perturbation theory to realize a long-range coherent transport inside the ground-state manifold of neutral atoms system. With the adjustment of the Rabi frequencies and the interatomic distance, this model can be used to simulate various single-body physics phenomena such as Heisenberg $XX$ spin chain restricted in the single-excitation manifold, coherently perfect quantum state transfer, parameter adjustable Su-Schrieffer-Heeger model, and chiral motion of atomic excitation in the triangle by varying the geometrical arrangement of the three atoms, which effectively avoid the influence of atomic spontaneous emission at the same time. Moreover, the influence of atomic position fluctuation on the fidelity of quantum state transmission is discussed in detail, and the corresponding numerical results show that our work provides a robust and easy-implemented scheme for quantum state transport with neutral atoms.